Back up your cluster on a regular basis. Even though Sun Cluster software provides a highly available environment, with mirrored copies of data on the storage devices, Sun Cluster software is not a replacement for regular backups. A Sun Cluster configuration can survive multiple failures, but does not protect against user or program error, or catastrophic failure. Therefore, you must have a backup procedure in place to protect against data loss.
The following information should be included as part of your backup.
All file system partitions
All database data if you are running DBMS data services
Disk partition information for all cluster disks
The md.tab file if you are using Solstice DiskSuite Solaris Volume Manager as your volume manager